Masterbatch is a high proportion of additive and thermoplastic resin, pigments or the good dispersion of plastic colorants, it chooses the resin of colorants have good wetting and dispersing effect, and has good compatibility with being shaded material.

So the carrier in the masterbatch, is one of the very important component in carbon black is a kind of weak polarity and low water wettability of paint. One of it belongs to hard to disperse dye, use the normal mechanical method, is to raise the fineness of carbon black, but hard to get highly dispersed in the water system. So, we adopt the method of wet surface treatment to change the characteristics of the carbon black surface functional groups, in order to increase the water wettability.

Wet surface treatment of silica, can generally be used in a variety of oxidant, such as: potassium permanganate, potassium dichromate oxidation treatment, acid and nitric acid, etc.

Surface treatment of carbon black, aqueous solution by phase inversion and granulation system of polypropylene masterbatch, the carbon black particle size under (including 1 m.

Black carbon oxidation conditions:

(1) oxidation time and ph value

(2) oxidation time and carboxyl content

(3) the dispersion of carbon black processing